FACT: The reason that (research) submarines are yellow is because yellow is one of the last few colors to be visible at great depth.

Dynamic colors, also called brighter hues, tend to motivate both the mind and body and can be sources of energy and creativity. Unaggressive colors, aka the more basic and muted colors, often increase intellectual focus and possess a calming effect. On the coloring wheel, productive colors are classified as the warm colors and activate the audience more than the passive colors. Recurring colors, some of the cool shades, are more creatively receding, which suggests they appear distanced next to more active colors.